66(P41) いもち病菌の新しい植物毒性代謝産物といもち病菌による芳香族および脂肪族炭化水素およびカルボニルの代謝(ポスター発表の部)

概要

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New phytotoxic metabolites, named pyriculone and zingibertriol, were isolated and their structures were elucidated by spectroscopic as well as chemical reactions. Pyriculone was successfully prepared by DDQ oxidation of pyriculol and found to be more toxic to the rice plant than pyriculol. Its production by the rice blast disease fungus, Pyricularia oryzae Cavara (Magnaporhte grisea (Hebert) Barr), had tendency to observed by the fresh field isolate, while some strain being stocked in laboratory could not be observed for the production of pyriculone. Zingibertriol is a first sesquiterpenene found among the blast disease fungi. The productivity of which was found to be restricted among the blast fungus, P. zingiberi, from mioga. The aromatics (phenylpropenes and indene) as well as aliphatics (limonene and β-ionone) were found to be metabolized by the blast disease fungi to dihydroxylated as well as monohydroxylated metabolites. The carbonyls (indanone and β-ionone) were also found to be reduced by the fungi. The stereospecificity of the conversion were different among the substrates.
天然有機化合物討論会の論文
1996-09-02